Tokyo-based crap gadget maker Thanko is rolling out another USB device, but this time the gadget (kind of) makes sense. It’s a USB mini camera [JP] that can be used for a variety of activities, including shooting pictures and videos underwater. It’s water-proof up to a depth of 20m.

The camera has 4GB of memory, a USB 2.0 interface, weighs 22g and is sized at 68×19mm. It shoots video (stored as AVI files) in 736×480 resolution (VGA) at 20fps. Charge the battery for an hour and you can use the camera for 1.5-2 hours. It’s only compatible to Windows XP and Vista, however.

The camera is already available in Japan where it costs $140, and Thanko throws in a head band for it, too. Expect it to get listed in Thanko’s international online store soon for customers living outside Japan.